Journal
MATERIALS LETTERS
Volume 64, Issue 5, Pages 565-568Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2009.11.071
Keywords
Nanocomposites; Porosity; Nanomaterials; Self-assembly; Cobalt intercalation; Manganate nanosheet
Funding
- Korean Government [KRF-2008-313-C00442, 20090063005]
- BioGreen 21 Program [20070401034003]
- Ministry of Knowledge and Economy (MKE)
- MOST
- POSTECH
- Rural Development Administration (RDA), Republic of Korea [20070401034003] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Mesoporous compound of cobalt-layered manganese oxide was synthesized by self-assembly reaction between 2D manganate nanosheets and cobalt ions. It was found that 2D manganate nanosheets are interstratified with cobalt ions, leading to the formation of porous intercalation heterostructure with expanded surface area of similar to 44-100 m(2)/g. The mesopores with the average diameters of similar to 11-17 nm originate from the house-of-cards type stacking of the layered manganate crystallites. Co K- and Mn K-edge X-ray absorption spectroscopy revealed that both the cobalt and manganese ions are stabilized in octahedral symmetry with the mixed oxidation states of Mn3+/Mn4+ and Co2+/Co3+. Considering high oxidation states of component metal ions, this porous Material is expected to be very useful as redox catalysts and/or lithium intercalation electrodes. (C) 2009 Elsevier B.V. All rights reserved.
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